Optimization methods for the insertion, protection, and detection of digital watermarks in digitized data

Abstract

The implementations of digital watermarks can be optimally suited to particular transmission, distribution and storage mediums given the nature of digitally-sampled audio, video and other multimedia works. Watermark application parameters can be adapted to the individual characteristics of a given digital sample stream. Watermark information can be either carried in individual samples or in relationships between multiple samples, such as in a waveform shape. More optimal models may be obtained to design watermark systems that are tamper-resistant given the number and breadth of existent digitized sample options with different frequency and time components. The highest quality of a given content signal may be maintained as it is mastered, with the watermark suitably hidden, taking into account usage of digital filters and error correction. The quality of the underlying content signals can be used to identify and highlight advantageous locations for the insertion of digital watermarks. The watermark is integrated as closely as possible to the content signal, at a maximum level to force degradation of the content signal when attempts are made to remove the watermarks.

Description

RELATED APPLICATIONS

[0001] This application is a continuation of pending U.S. patent application Ser. No. 10 / 369,344, filed Feb. 18, 2003, which is a continuation, and claims the benefit, of pending U.S. application Ser. No. 09 / 281,279 (issued on Feb. 18, 2003 as U.S. Pat. No. 6,522,767), which is a continuation of U.S. patent application Ser. No. 08 / 677,435 filed Jul. 2, 1996 (now U.S. Pat. No. 5,889,868), each of which patent applications are incorporated herein in their entireties.

[0002] This application is also related to the following pending applications: U.S. patent application Ser. No. 08 / 674,726, filed Jul. 2, 1996, entitled “Exchange Mechanisms for Digital Information Packages with Bandwidth Securitization, Multichannel Digital Watermarks, and Key Management”; pending U.S. patent application Ser. No. 08 / 999,766, filed Jul. 23, 1997, entitled “Steganographic Method and Device”; pending U.S. patent application Ser. No. 09 / 046,627, filed Mar. 24, 1998, entitled “Method for ...